wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);

Paint paint = new Paint();
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.MULTIPLY));

WindowManager.LayoutParams params = new WindowManager.LayoutParams(WindowManager.LayoutParams.WRAP_CONTENT, WindowManager.LayoutParams.WRAP_CONTENT, WindowManager.LayoutParams.TYPE_SYSTEM_ALERT, WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL, PixelFormat.TRANSLUCENT);

params.gravity = Gravity.LEFT | Gravity.TOP;
params.x = 0;
params.y = 0;

overlayImage = new ImageView(this);
int width = 1080;
int height = 1920;
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);

Paint paint2 = new Paint();
paint2.setColor(Color.BLUE);
paint2.setStyle(Paint.Style.FILL);
canvas.drawPaint(paint2);

overlayImage.setImageBitmap(bitmap);
overlayImage.setLayerType(LAYER_TYPE_HARDWARE, paint);
wm.addView(overlayImage, params);